Machine for making stereotype molds



Aug. 1 l, 1925.

C. N. SMITH I MACHINE FOR MAKING STEREOTYPE MOLDS Filed Julie 23. 1924 5Sheets-Sheet l Aug. 11, 1925. 1,549,227

(2. N. SMITH MACHINE FOR MAKING STEREOTYPE MOLDS Fil.e 1 25. 1924 sSheets-Sheet 2 c. N. SMITH MACHINE FOR MAKING STEREOTYPE MOLDS- PatentedAug. ll, 1925 llll'l fiw STATES @FFlQ-E.

CHRISTIAN N. SMITH, F ELGIN, ILLINOIS, AS'SIGNOR OF ONE-HALF TO WILLIAMP. TOPPING, OF ELGIN, ILLINOIS.

MACHINE FOR MAKING: STEREOTYPE MOLDS.

Application filed June 23, 1924. Serial No. 721,831.

To aZZwhomit may concern. of a rear plunger-head shown in Fig. 7 and Beit known that l, Crnusrmn N. SMITH, in Fig. 6; and Fig. 9 is a similarplan View a citizen of the United States, residing in of a front plungerhead shown in Figs. 1, Elgin, in the county of Kane and State of 1, 5,and 7.

Illinois, have invented certain new and usein constructing a machine fortainping ful Improvements in Machines for Making and making stereotypemolds or matrices in Stereotype Molds, of which the following isaccordance with my invention, 1 provide a a specification. main frame 1,having upright frame mem- This invention relates to that class of moldbers 2 located on opposite sides of the ma.-

Zn or matrix-making machines which are chine, and having a base 3, orsupporting adapted to be used for tainping or making legs, on which theupper or main frame is molds or matrices for use in making metallicsupported. Longitudinal side frame memprinting plates, such, forexample, as stereobers 4t, extend lengthwise of the machine, on typeplates. opposite sides thereof. And lower trans- T he principal objectof the invention is to verse frame members 5, and an upper turns 7provide a simple, economical and etlicient verse member 6, extend acrossthe machine. machine for tamping or making molds or The upper transversemember 6 is supported matrices for use in making metallic printing byand forms a connect-ion between the upplates, such for example asstereotype plates. per extrei'i'iities of the upright standards, or

3i) Other and further objects of the invention frame members, 2. And thelower frame will appear from the following description member, ormembers, 5 extends across the and claims, and. from an inspection of themachine and forms a rigid connection beaccompanying drawings which aremade a tween the side frame members which are thus Part h f rigidlyconnected, so as to form a strong and The invention consists in thefeatures, rigid a e ap d to Withstand t e combinations, details ofconstruction, and stresses and strains to which the machine, i

arrangements of parts herein described a d subJeCted in use. A bed 7 issup-ported upon hi i and extends across the space between the I flaccompanying d i longitudinal frame members at, l, and Fi 1 i a i i f tl ti 1 lengthwise of the machine between the 35 an improved tainping ormold-making nia- Si-QHClMClS slflc frame mbers 2, 2-

chine constructed in accordance with my inocated at one end of themachine, and

vention; Fig. 2 is a view in side elevation removably supported by thelongitudinal of the machine shown in Fig. 1; Fig, 3 is frame members l,1, is a table or bed 8, the

a view in elevation partly in central vertitop surface 9 of which isfiat, and substancal section with parts broken away and tially flush, orlocated in the same horizontal omitted, of a mold-making machine such asplane with the flat top surface of the main is shown in Figs. 1 and 2,but with a modi bed 7. The bed '7 is reciprocatingly mounted iied formof plungers; Fig. 1 is an enlarged upon the main frame in position tomove detail view in'elevation of the plunger mechendwise orlongitudinally of the latter, and

anism showing the front plunger and the to form a support fora type formor printplunger guiding means, and the bed shown lug-plate 10 to be laidthereon, and from in F' W 1 and 2, with matrix-forming mathe type orprinting face of which the mold.

.l a type-form supported by the bed or matrix is to be made.

vable beneath the plungers; Fig. 5 The reciprocating bed '7 is, bypreference,

a enlarged (retail view in horizontal secslidably mounted upon parallellongitudt tion taken on line 5 5 of Fig. l, looking nallyextendinghorizontal tracks 11,11, each downward, showing theplunger-head conof said tracks being, by preference, fixed to struction;Fig. 6 is an enlarger detail View a corresponeing side frame member 4:,or

in elevation of the rear plunger or plunger formed integral therewith.The bed and head, with parts broken away; Fig. '7 is an tracks areprovided with tongue and groove enlarged detail view in vertical sectionconnections, comprising one or more tongues through the front and rearplungers or 12 fixed to one of said members, for example, plunger headsshown in Figs. 1, :2, l, 5 and to the bed, and each of said tonguesextend- 6; I 8 is a detail plan view of a portion ing into and insliding engagement with a no corresponding longitudinal guiding slot orgroove 13 in the'upperface of a correspond ing adjacent track 11. (SeeFig. 1).

The reciprocating bed 7 is provided with suitable operating 1 meanswhereby it is caused to move backward and forward or to reciprocate andcarry with it the type form or printing plate 10 and thematrix formingmaterial, matrix or mold 141 and to be operated upon. The means foroperating or reciprocating and stopping and starting the reciprocatingbed 7 may be of any desired, ordinary and well known, or suitable form.

In the form of the device herein shown, the bed is provided withalongitudinal depending toothed rack which extends along the under sideof the bed and down ward between the bed-supporting tracks 11, 11; and avtoothed driving wheel or spur gear 16 in toothed engagement with saidrack and fixed to a shaft 17 which is journaled in suitable bearings 18,19 in the main frame serves as a means for reciprocating the bed, and isadapted to serve as a means for connecting the bed 7 and toothed rack 15with a source of power if desired. The shaft '17- is, by preference,provided with a hand wheel 20 fixed thereto thus affording a convenientmeans for operating the reciprocating bed manually when and as desired.And a driving shaft 21 journaled in, suitable bearingsin the main frameis operatively connected with the bed 7 and toothed rack 15 and with asource of power, such, for example, as an electric motor by means of atrain of gears 23 which may be of any desired ordinary and well known orsuitable form, or by gear and shaft or belt and pulley mechanism orother driving means and clutch mechanism all of which may be of anydesired ordinary and well known or suitable form, and which it istherefore believed to be unnecessary to show or describe in detailherein otherwise. than as shown in the drawings in which the drivingshaft 21 is shown provided with a driving pulley 24 fixed thereto, saidpulley being 'operatively connected with the driving shaft 25 of themotor 22 by means of a belt pulley'26 fixed to the motor shaft and abelt 27 mounted on and operativcly connecting the pulleys 24 and 25. Thedriving shaft 21 is operatively connected with the bed 7 and toothedrack 15 already described, by means of a train of gears 23,

as already suggested, said train of gears comprising a spur gear wheelor 131I1l0l1'28 fixed to the rotative driving shaft 21 and in toothedengagement with a spur gear 1 Wheel 29 fixed to an int rmediate rotativeshaft 30, Which is journaled in suitable bearings in the'frame andlocated intermediate the driving shaft 21 on which the belt pulley 24 ismounted, and the shaft 17 on which the rack-engaging spur gear or pinion16 is fixed, for reciprocating the bed and toothed rack 15 engaged bysaid gear in Fixed to the intermediate shaft 30 is a spur pinion 31which is in toothed engagement with a spur gear wheel 32 loosely'mountedon and adapted to be connected with and disconnected from the shaft 17by means of clutch mechanism which may be of any desired ordinary andwell known or suitable form. Means is thus provided for operab ing thebed 7 and its toothed rack 15 in one direction of the movement of thebe, A reversing gear and clutch mechanism is provided which comprises anintermediate reversing spur wheel or idler 33 rotatively mountedon asuitable shaft or support and in toothed engagement with a toothedpinion or spur gear wheel 34 fixed to the intermediate shaft 30, saidspur gear or idler 33 being also in toothed engagement with a spur gearwheel. 35 which is, by preference, loosely mounted on and adapted to beconnected in fixed relation to and disconnected from the shaft 17already described, by means of suitable clutch i'nechanism which may beof any desired ordinary and well known or suitable form. Suitable clutchmechanism is provided for connecting the spur gear wheels 32,successively or alternately with the shaft 17 on Which the racleengagingspur gear wheel or pinion 16 is fixed, and for releasing ordisconnecting each of said gear wheels from said shaft 17 alternately oras desired. The clutch mechanism comprises a movable clutch member ormembers 36, 36 on and movable longitudinally of the shaft 17 into andout of clutching engagement with clutch members 37 and 38 respectivelyin successive order or alternately as desired, and adapted to be movedto neutral position or out of open tive clutching engagement with bothofsaid clutch members 37 and 38, so to leave both of the spur gearwheels and 35 out of engagement with or disconnected from the shaft 17,when desired. The clutch members 36, 36 may be in the form of frict-ionclutch members or of any desired ordinary and well known form, and, inthe form shown in the drawings, said clutch members are soconnected withthe shaft as to rotate therewith but are freely mov able longitudinallyof the shaft into and out of clutching engagement with the clutchmembers 37 and 38 respectively, located on opposite sides of the saidmovable clutch members 36, 36. Suitable clutch-operating levermechanismnot shownis provided for operating the clutch members 36, 36,and asthe clutclnoperating mechanism may be of any desired ordinary andwell known form, and such clutches and clutch-operating mechanism arewell known to those skilled in the art it is not deemed necessary ordesirable to further describe or illus- .a-rds or upright frame members:2 in a plunger-operating crank shaft which connected with a motor orsource of power in any desired ordinary and well kno manner, forexample, by means of :2 pulley 41 fixed to said crank shaft a beltpulley 42 fixed to the driving shat or motor shaft 25, and a belt 43mounted on and connecting said belt pulleys 41. and 42.

Operativcly connected with and supported by the phinger-operating crankshaft is a pair of reciprocating plungers 44, 45, each of which isoperatively connected with the crank shaft 40 in such a manner as toenable the matrix-engaging members of the plungers to alternately engageor strike the matrix-forming material.

The plungers 44, 45, are mounted in parallel relation to each other inposition to extend over and across the reciprocating bed 7 andtransversely with respect to said bed and with respect to the path ofmovement of the bed and the type form, or printing plate, andmatrix-forming material sup ported by the bed.

Each of the plungers 44, 45, comprises in its construction a pair ofpitmen or connecting rods 46, 46, the upper ends of which are mountedupon corresponding cranks, eccentrics, or equivalent elements on orforming part of the plunger-operating shaft 40, which is, by preference,in the form of a shaft having two cranks or eccentrics connected withand supporting and adapted to operate the front plunger 44, and twocranks, eccentrics, or wrist pins, connected with and adapted to supportand operate the rear plunger 45. The plungers 44, 45, are, bypreference, of substantially identical construction, but differing inminor details of construction, and adapted to operate close together andin alternate order, so that one moves upward while the other is movingdownward in making a stroke, and vice versa. Each of said plunger-s 44,45, has a plunger head which is pivotally connected with and supportedby the corresponding pit-men or connecting rods, 46. The head 47 of thefront plunger 44, being connected with the frontpair of pitmen 46 bymeans f a horizontal rod or bar 48, and the plunger head 49, or rearplunger head, being pivot-ally connected with, and adapted to besupported and operated by, the rear pair of pitmen 46, by means of asimilar horizontal, preferably round, rod or bar 50.

The rods or bars 48 and 50 each extend through horizontal openings 51 inthe lower ends of the corresponding pitmen 46. And each of these plungerheads 47, 49, is provided at its opposite ends with an upright slidingblock or shoe 52 mounted on the corresponding end of the horizontal rodor war 48, 50, and forming opposite end men bers of the respectiveplunger heads. These sliding blocks or end members 52 of the plungerhead are slidably mounted between guiding members or ways fixed to theupright frame members 2, so as to form a gi'ziding slot or slots 54 inwhich the sliding blocks or end members 52 of the heads are slidablysupported and guided. Each of the end members or sliding blocks 52 isprovided with a horizontal opening into which the end of thecorresponding rod or bar 50 extends. And each rod or bar 50 thus formsan upper horizontal member of one of said plunger heads 44, or 45, asthe case may be.

Each of the plunger heads 44, 45, is provided with a pair of horizontalbars 55, 55, located side by side in parallel relation to each other,and spaced apart so as to provide a suitable space or spaces 56therebetween, for receiving the head members by means of which said barsare connected with each other and with the upper head member 50 locatedabove the bars 55 and the bottom plunger bar or head member 56 locatedbelow said bars 55, and yieldingly connected therewith, as hereinaftermore particularly described.

Mounted between, and by preference, at or near the opposite ends of eachpair of parallel side bars 55, 55, of each plunger head, respectively,are upright connecting brackets, or forked connecting arm members 5'7,each having a pair of upper forked arms 58 spaced apart and adapted toreceive the lower end of a corresponding pitman 46 therebet-ween. Eachof the forked arms 58 has a horizontal opening therethrough, throughwhich extends a corresponding horizontal rod or bar 50, alreadydescribed. Each of the plunger-head members, or connecting bracketmembers 57, has an upright central opening 59, which is, by preference,screwthreaded, and provided wit-h a screw tneaded vertical stem, orscrew, 60 extending into and in threaded engagement with such opening,and projecting downward through and beyond the end of said member 5 andbetween the side bars 55, Each pair of side bars 55, 55, is providedwith a pair of connecting blocks or bushings 61, each having an opening62 therein, int-o and through which extends a corresponding verticalscrew or stem 60. These blocks 61 are rigidly secured between thecorresponding side bars 55, by means of beaded screws 63, or othersuitable securing means, so as to connect the side bars at or near llUtheir opposite ends, in rigid suitably spaced apart relationv to eachother, and form rigid connecting means between said'bars and the stems60. Threaded nuts 6% are mounted on the stems between the blocks 61 andthebraclret members 57 and between said bracket members and the uppermar ginsoi' the side bars. And similar threaded nuts 65 are mounted inthreaded engagement with the lower ends of the threaded vertical stemsor screws 60, and provided with washers 66 between said nuts and thebottom faces of the blocks 61 and side bars 55. A. strong rigidconnection is thus afforded betweenthe side bars 55 and the plunger heador frame member 57, said frame members 57 being connected with the upperplungerhead members or rods 50, as already described.

he end blocks 61 each havean upper end recess 67, adapted to admit thelower end of a corresponding sliding block or. end member 52, and permitthe side bar 55 and end blocks 61 to bemoved or adjusted upon the stems60, with respect to the blocks 52.

Each of the bottom bars 56 of the plunger-heads 44, 45, isyieldablyconnected with the corresponding side bars 55 by means of a series ofupright studs or bosses 68 fired to and extendingupward from said bottombars 56, respectively, and between.

the corresponding side bars 55. Angular bearing blocks 69, are mountedupon opposite sides of each upright stud or threaded stem 68, andbetween the-side bars 55, to which said blocks 69 are rigidly secured bymeans of headed screws 70, or other suitable securing means. Each of theblocks 69 is provided with a horizontal opening 71, which forms ajournal bearing for a pivoted or rocking block, or bearing member72,{mounted between said bearing blocks 69 and encircling acorresponding upright threaded stem 68, which extends through a suitableupright central opening 7 3 in such rocking or pivoted bearing block 68.Each rocking or pivoted bearing block 72 has a pair of laterallyprojecting trunnions, axle ends or similar pivoting supporting means 7%supported in the openings 71 in the angular bearing blocks 69. Each ofthe pivoted or rocking bearing blocks 72 is thus adapted to rock on ahorizontal axis formed by the trunnions or pivots 74-, said axes beingbetween and parallel to the side bars 55, 55 of the plunger head, and atright angles to the path of movement of the reciprocating bed 7 and thematrix or matrix forming material and type form or printing platesupported upon such bed. Compression springs 75, are interposed betweenthe bottom faces of the pivoted or rocking hearing tom bar 56; and eachof said springs, by preference, encircles and is held in :place looks 72and the top face of the bot-- pitmen and the adjacent ends of theplunger head; and such plunger head is therefore provided withrelatively short upwardly pro ecting stems 7 6 anchored inthe oppositeend portions of the bottom bar 56, and each;

encircled by an end compression spring. 77 which is lnterposed betweenthe .recessedend portion 7 8 of the adjacent end block: 61. and

the upper face of the bottom bar 56 near the end thereot.

vided with a securing collar or, split ring 7 8' which enclrcles thestem and is rigidlyse; cured thereto in any desired suitable manner, forexample by means of a clamping screw 79 in the end portions. of the ringwhich are provided with suitable. perforations for receiving such screw,one of the.

ends being in threadedengagement with the screw, and the ring being rigdly secured to the bottom bar by screws or any suitable securing means.The other plunger head, for example, the plunger 45 has its pitmen orconnecting rods located between the pitmen 64 of the front plunger 44,and has an upwardly projecting stem 68 located at or near each end ofsuch rear plunger head and between each pitman and the adjacent end ofthe plunger; andthe rear plunger is here shown provided with two stems68 and the springs located between the pitmen, while the front plungerin the form shown in the drawings has three stems 68 and springs 7 5located between the pitmen 46. Any desired number of such stems andsprings however, may be employed. And each of the stems 68 is providedwith suitable means, such, for example, as an adjusting nut 80, and alock nut 81 in threaded engagement with such stem and adapted to engagethe upper face of the corresponding rocking or pivoted bearing block 72and bar or bars 55, and adapted to limit the downward movement of thebottom bar 56 with respect to the upper plunger head members or bars 55and rod or bar 50.

Compression springs 82, 82, are mounted on opposite sides of and adaptedto engage each rocking or pivoted. or yielding stem 68 in such a manneras to permit but yieldingly resist the rocking or swinging move ment ofthe stems and of the bottom bar 56 fixed to the lower ends of suchstems. I prefer to mount these springs 82 in the side bars 55 inposition to engage opposite sides of each stem 68, respectively, belowthe level of the axes of the pivoted or rocking bear- (See Fig. 5.);Each of the stub stems 76 is, by preference, proing members 72, orbelow! the level of the horizontal axes of the stems, said axescorresponding with the centers of the hon- Z ontal axles or pivot ortrunnion members i l already described. The movement of the bottom bar56, and the imitrix-engaging tool, strip or member 8%, laterally withrespect to the upper plunger members 55 and 50 is thus permitted butyieleingly resisted by the action of the side compression springs 82which are held, preferably adjustably, in position, by means of headedscrews 83 mounted in suitable openings in the side bars 55 and encircledby the corresponding springs 82, said springs 82 each having one end inengagement with the rocking bearing block 72 below the level of thehorizontal axis of such block, and having the other end of such springin abutting engagement with the inner face of a corresponding screw heador with any desired abutting element.

Firmly secured to the bottom and extending lengthwise of each bottom bar56 of each plunger head is a matrix-engaging or mold-beating tool ordevice 8% which comprises a strip of rubber or similar materia 85 havinga multiplicity of depending flexi blebosses, teeth or projections 86suitably spaced apart on its under side and adapted to engage or strikeand to be moved rapidly and repeatedly into and out of striking oitamping contact or engagement with the mold or matrix-forming materialduring the operation of tamping, making or forming the mold or matrix.This tamping tool or strip is formed, by preferen e, of a strip of wood84; having laterally projecting up per edge portions or upwardly and outwardly inclined side marginal surfaces adapted to be detachably clampedbetween inwardly projecting flanges or bottom edges of the bottom bar 56and a detachable side clamping strip or bar 87 which is removablysecured to the side of the bar 56 by means of headed screws 88 or anydesired ordinary and well known securing means; said strip of woodhaving a bottom strip 85 of flexible material, such for example asrubber, attached to the bottom face of the wooden strip by means ofstrong glue or adhesive material, or other suitable securing means, andsaid bottom strip 85 having projections 86 of rubber or similar flexiblematerial suitably spaced apart and adapted to strike and tamp andrapidly and repeatedly plunged int) and out of contact with the mold ormatrix-forming material while such material is in a compressible oryielding and sufficiently soft or plastic condition to be forced intothe spaces and interstices in the printing side of a type form orprinting plate, or into close contact with the printing side of suchtype form or printing plate, so to make a matrix or mold to be used inmaking-a stereotype plate, or any printing plate which can be made byusing such a mold or matrix.

By making the strip 84 of wood instead of metal, it will be suliicientlystrong for the uses and purposes for which it is employed, andsul'liciently frangible or breakable to be crushed or broken whensubjected to unnecessary or undesirable or accidental stresses andstrains which might, without such crushing or breaking of the woodedstrip, cause injury to the machine or the work or material to beoperated upon, or endanger the machine, the work or material operatedon.

From the foregoing, it will be readily understood by those skilled inthe art, that the plungers are adapted to be rapidly and re peatedlymoved into and out of striking or 'amping contact or engagement with thesheet of matrlz: or mold-formmg material to be operated upon, while thelatter is moving with the type form or printing plate on which thematrix-forming material is laid, and with the bed on which the type formor printing plate and sheet of matriX-forining material issupportedbeneath the plungers; and that the matrix-engaging members ofthe plungers are adapted to yield or to be moved or rocked upon ahorizontal axis or pivotal center which axis is at right angles to thepath of movement of the horizontally moving reciprocatory bed and of thetype form or printing plate and matrixforming or mold-forming materialto be operated upon, thus permitting the matrix-engaging men'ibers ofthe plungers to move with the man-informing material or mold while suchmatrix-engaging members and matrix-forming material are in actualcontact, and without interfering with or affecting the uniform anddirect upward and downward movements of the other plunger members towhich the bottom plunger bar and matrix-engaging parts of the plungersare pivotally or rockingly connected.

The usual brake mechanism 90, which may be of any desired ordinary andwell known or suitable form, is provided, for stopping the machine whendesired. The brake here shown comprises a brake shoe 91 on a pivotedbrake arm or lever 92 and adapted to frictionally engage the face of thebelt pulley. An operating lever 93 is operatively connected with thebrake shoe lever 92 in any suitable or ordinary manner, for example, bymeans of a lever 94 which is adapted to operatively engage and tightenor release the brake shoe, and a connecting rod 95 which is connected atone end with the brake-operating lever 93 and at its other end with thelever 94, which may also support a belt-tightening pulley 96,

A hand lever 97 is operatively connected.

with the clutch mechanism above described, in any ordinary and wellknown manner.

tomatic bedactuating or stopping and starting or controlling meansnotshown such, for example as re shown in Letters Patent No. 1,379,317,dated May 24-, 1921, "tor an improvement in machines formaking stereoBut as automatic stopping or type molds. controlling means adapted toautomatically stop and release a reciprocating bed or supporting tableis shown in said patent, and is well known to those skilled in the art,itis not deemed necessary or desirable to describe the same, or theelectric switch mechanism for stopping and starting the electric motor,or the means for stopping and starting the machine or any of its parts,otherwise than as herein shown and described, or as shown and describedin said patent.

A receptacle or. box 98 is for containing any necessary switch mechanismor other parts.

Matrix-engaging rolls 99, 99 are located on opposite sides of thereciprocating plunger mechanism and adapted to engage and hold downagainst the top face of the printing plate or type form a sheet orsheets of matrix-forming material to be tamped or operated upon by thereciprocating plunger mechanism. These rolls 99 are each supported insuitable hearings in the upwardly and downwardly freely movable outerends of supporting arms 100, pivotally mounted on the frame of themachine by means of supporting bolts or pivots 101, as shown in Figs. 2and 3, the supporting bolts or pivots being, by preference, anchored inthe upright side frame members 2 adjacent to opposite ends of thereciprocating plungers, and in position to movably or adjustably supportthe rolls 99 on opposite sides of the plungers and to permit theplungers to opcrate between said rolls, and between the pivotedroll-supporting arms and their supports 101. 1

lVhile I have described a pair of plungers and the means for operatingthe same, it will be readily under-stood by those skilled in the art, inview of the foregoing description, that one or any desired number ofthese plungers,'0r any desired number of pairs of the same, may beemployed and that other modifications may be made in the plungers and inother parts of the machine without departing from the spirit of myinvention.

In Fig. 3 is shown a pair of reciprocating plungers which are supportedand operated in all respects as above described and shown and which maybe constructed in all respects as described and shown in or withreference to the other figures of the accompanying drawings. But in theform shown in said Figure 3, the plunger heads 44 or the parts thereofwhich correspond with or comprise the parts 55, 55, 57, 57, 58, 58, 52,52, 69 69, 61, 61 are all made in one integral piece. In all otherrespects the plungers and plunger heads or plunger parts shown in Fig. 3are made and adapted to operate as already described in connection withor in reference to the other figures of the drawings.

I claim:

1. In a machine of the class described, an upwardly and downwardlymovable reciprocating plunger comprising upper and lower plunger membersconnected in movable relation to each other and adapted to permit themovement of such lower plunger member at an angle with respect to thedirection of movement of the upper plunger member.

in a machine of the class described, the combination of an upwardly anddownwardly movable reciprocating plunger comprising an upper plungermember and a lower plunger member pivotally connected with said upperplunger member and adapt ed to swing upon its axis at an angle withrespect to the direction of movementof said upper plunger member andmeans for op erat -g the plunger.

In a machine of the class described,

the combination of an upwardly and downmovable reciprocating plungercomupper and lower pirotau connected members adapted to permit the cmentof the lower plunger member on its axis. means for permitting andyieldingl resisting the movement of the lower plur' nember on its axis.and means for opera the plunger.

a. In a machine of the class described, the combination of areciprocating plunger comprising pivotally connected plunger membersadapted to permit the movement of one of said plunger members upon itsaxis at angle-with respect to the direction of reciprocatory movement ofthe other of said pivotally connected plunger members, means for oerat-ively connecting one of said plunger members with an operatingshaft. and means for guiding theplunger.

5. In a machine of the class described, the combination of areciprocating plunger comprising upper and lower pivotally connectedplunger members adapted to permit the moyement of the lower plungermember upon its 9X18 at an angle with respect to the direction ofmovement of the upper plunger member, means for permitting andyieldingly resisting the movement ofthe lower plunger member withrespect to the upper plunger member, and a rotative plunger-op- Juncrating crank shaft operatively connected with said upper plungermember.

6. In a machine of the class described, the combination of an upwardlyand downwardly movable reciprocating plunger comprising a plunger-headhaving upper and lower pivotally connected plunger-head members,resilient means on the plungerhead adapted to permit and yieldinglyresist the movement of the lower plunger-head member on its axis withrespect to the upper plunger head member, a plunger operating shaft, andmeans for operatively connecting the plunger-operating shaft with theplunger-head.

7. In a machine of the class describeth the combination of an upwardlyand down wardly movable reciprocating plunger comprising a plunger-headhaving upper and lower pivotally connected plunger-head members adaptedto permit the movement of the lower plunger-head member transverselywith respect to the upper plungerhead member, a plunger-operating shaftrotatively mounted above the plunger-head, and pitman mechanismconnected with the plunger-head and with the plunger-operating shaft andadapted to be operated by the latter.

8. In a machine of the class described, the combination of areciprocating plunger com prising a plunger-head having upper and lowerpivotally connected plunger-head members adapted to permit the movementof the lower plunger-head member upon its axis transversely with respectto the upper plunger-head member, resilient means on the tilunger-headadapted to permit and yieldingly resist the upward movement of the lowerplunger-head member with respect to the upper plunger-head member, aplunger-operating shaft rotatively mounted in a suitable support, andmeans for operatively connecting the plunger-operating shaft with theplunger head.

9. In a machine of the class described, the combination of areciprocating plunger having upper and lower pivotally connectedplunger-head members, resilient means on the plunger-head adapted topermit and yieldingly resist the movement of the lower plunger-headmember on its axis with respect to the upper plunger-head member,resilient means on the plunger-head adapted to permit and yieldinglyresist the upward movement of the lower plunger-head member with respectto the upper plunger-head member with which said lower plungerheadmember is pivotally connected, and means for operatively connecting theplunger-head with the plunger-operating shaft.

10. In a machine of the class oescribed, the combination of areciprocating plunger comprising a plunger-head having upper and lowerpivotally connected plunger-head ers, means for permitting andyieldresisting the movement of the lower .iger-head member on itspivotal axis with respect to said upper plunger-head member, resilientmeans on the plunger-head adapted to permit and yieldingly resist theupward movement of the lower plungerhcad member with respect to saidupper plunger-head member, and means for operating the plunger.

11. In a machine of the class described, the combination of areciprocating plunger having upper and lower pivotally connected plungermembers, means for permitting and yieldingly resisting the movement ofthe lower plunger-head member on its axis with respect to said upperplunger-head member, resilient means adapted to permit and vieldinqlyresist the upward movement or the pivoted lower plunger-head member withrespect to the plunger member with which said lower plunger member ispivotally connected, a plunger-operating crank shaft, and means foroperatively connecting the crank shaft with one of said pivotallyconnected plunger members.

12. In a machine of the class described,

the combination of a reciprocating plunger comprising a plunger-headhaving upper and lower pivot-ally connected plunger-head members,resilient means on the plungerhead for permitting and yieldinglyresisting the movement of the lower plunger head member on its axis,resilient means on the plunger-head adapted to permit and yieldinglyresist the upward movement of tl e lower pivoted plunger-head memberwith respect to the plunger-head member with which said lowerplunger-head member is pivotally connected, means for guiding theplunger head, a plunger-operating shaft rotativcly mounted in suitablebearings, and connecting mechanism pivotally connected with saidplunger-head and opcratively connected with said plunger-operatingshaft.

13. In a machine of the class described, the combination of areciprocating plunger compriging upper and lower plunger-head members,means for flexibly connecting said upper and lower plunger-head members,said connecting means being adapted to permit the lower plunger-headmember to .nove up ward and downward with respect to said upperplunger-head member, resilient means for permitting and yieldinglyresisting the movement of the lower plunger-head member with respect tosaid upper plungenhead member, means for guiding the plungerhead, andmeans for operating the plunger. i i. In a machine of the classdescribed, the combination of a reciprocating plunger comprising upperand lower pivotally connected plunger head members, spring mechanism onthe plunger-head adapted to permit and yieldingly resist the movement ofthe lower plunger head member on its axis, means for permitting andyieldingly resist ing the upward movement of said lower pivotedplunger-head member with respect to the upper plunger-head member, arotative plunger-operating shaft operatively connected with the plunger,and means for guiding the plunger.

if). in a machine of the class described, the combination of areciprocating plunger comprising upper and lower relatively movableplunger members, pivoted bearing blocks rockingly mounted in one of saidplunger members, upright stems anchored in the other one of said plungermembers and slidable in said pivoted bearing blocks, spring mechanism onthe plunger adapted to permit and yieldingly resist the upward movementof the lower one of said plungerhead members with respect to the upperone of said plunger-head members, spring mechanism on the plungeradapted to permit and yieldingly resist the movement of said lowerplunger-head member 011 its axis with respect to the said upperplunger-head memher, a plunger-operating shaft, and means foroperatively connecting said plungerhead with the plunger-operatingshaft.

16. In a machine of the class described, the combination of areciprocating plunger comprising upper and lower plunger-head members,means for pivotally connecting said upper and lower plunger-head members, spring mechanism on the plunger head adapted to permit andyieldingly resist the movement of the lower plunger-head member on itsaxis with respect to said upper plunger-head member, spring mechanism onthe plunger-head adapted to permit and yieldingly resist the upwardmovement of the lower plunger-head member relatively to the upperplunger head member with which said lower plunger member is pivotallyconnected and means for operating the plunger.

17. In a machine of the class described, the combination of areciprocatng plunger comprising upper and lower pivotally connectedplunger members, means for permitting and yieldingly resisting theupward movement of the lower one of said pivotally connected plungermembers relatively to the other, spring mechanism adapted to permit andyieldingly resist the movement of-the lower one of said pivotallyconnected plunger members on its axis with respect to the other one ofsaid pivotally connected plunger members, a crank shaft rotatablymounted in a suitable support and operatively connected with saidplunger, and means for guiding the plunger.

18. In a machine of the class described,

the combination of a reciprocating plunger comprising upper and lowerflexibly connected plunger members, resilient means adapted to permitand yieldingly resist the ugward movement of the lower one of saidpivotally connected plunger members relatively to the other, resilientmeans on the plunger adapted to permit and yieldingly resist the lowerone of said pivotally connected plunger members on its axis relativelyto the other one of said pivotally connected plunger members, av bedmounted on a suitable support and adapted to move beneath said plunger,for supporting moldmaking material tobe operated upon in position to beengaged by the plunger, means for operating the bed, and means foroperating the plunger.

19. In a machine of the class described, the combination of areciprocating plunger comprising upper and lower flexibly connectedplunger members, resilient means adapted to permit and yieldingly resistthe upward movement of the lower one of said flexibly connected plungermembers with re spect to the other, resilient means on the plungeradapted to permit and yieldingly resist the movement of the lower one ofsaid flexibly connected plunger members at an angle to the direction ofmovement of said 'upper plunger member, a movable bed mounted on asuitable support and adapted to support and feed mold-making material tobe operated on in position to be progressively operated upon by theplunger, and means for operating the plunger.

20. In a machine of the class described, the con'ibination of areciprocating plunger comprising upper and lower pivotally connectedplunger members, resilient means adapted to permit and yieldingly resistthe upward movement of the lower one of said pivotally connected plungermembers rel atively to the other, resilient means on the plunger adaptedto permit and yieldingly resist the movement of the lower one of saidpivotally connected plunger members on its axis relatively to the otherone of said pivotally connected plunger members, a movable bed adaptedto support mold-making material in position to be operated upon.progressively by said plunger and in engagement with a type form orprinting plate supported by such bed, means for operating the bed, andmeans for operating the plunger.

' 21. In a machine of the class described, the combination of aplurality of reciprocating plungers each comprising a plunger havingupper and lower plunger members connected in movable relation to eachother, resilient means adapted to permit and'yieldingly resist themovement of such lower plunger member with respect to the upper plungermember with which the same is V movably connected, 9. rotativeplunger-operating shaft upon which both of said reciproerated upon bysaid plungers in the operation of making a matrix or mold for makingprinting plates, means for operating said bed, and means for operatingthe plungeroperating shaft.

23. In a machine of the class described, the combination of a pluralityof reciprocating plungers comprising a plunger having flexibly connectedupper and lower plunger members, a rotative plunger-operating shaft uponwhich both of said plungers are operatively supported, means for guidingsaid plungers, a movable bed adapted to support matrix-making materialmovably in position to be operated on by'the plungers, means foroperating the bed, and means for driving the plunger-operating shaft.

24:. In a machine of the class described, the combination of a pluralityof reciprocating plungers each comprising a plunger having pivotallyconnected upper and lower plunger members, a rotative plunger-operatingshaft upon which both of said plungers are operatively supported, amovable bed adapted to support and feed matrix-making material inposition to be operated upon by said plungers, means for operating thebed, and means for driving the plunger-operating shaft.

25. In a machine of the class described, the combination of a pluralityof reciprocating plungers each having flexibly connected upper and lowerplunger members, resilient means on each of said plungers adapted topermit and yieldingly resist the movement of the lower plunger member ofeach plunger with respect to the upper plunger member with which suchlower plunger member is flexibly connected, and means for supportingmatrix-making material to be operated on in position to be operativelyengaged by said plungers alternately, and means for operating saidplungers.

26. In a machine of the class described, the combination of a pluralityof reciprocating plungers each having flexibly connected upper and lowerplunger members, resilient means on each of said plungers adapted topermit and yieldingly resist the movement of the lower plunger member ofsuch plunger upward relatively to the upper plunger member with whichsuch lower plunger member is flexibly connected, means for supportingmatrix-making material in position to be operated on progressively bysaid plungers, and a rotative plunger-operating shaft upon which both ofsaid plungers are operatively supported.

27. In a machine of the class described, the combination of a pluralityof reciprocating plungers each having pivotally connected upper andlower plunger members, resilient means on each of said plungers adaptedto permit and yieldingly resist the movement a lower plunger member onits axis with respect to the upper plunger member with which such lowerplunger member is pivotally connected, resilient means on each plungeradapted to permit and yieldingly resist the movement of the lowerplunger member of such plunger upward relatively to the upper plungermember with which such plunger member is pivotally connected, a bedmovable beneath the plungers and adapted to movably support material tobe operated on in position to be engaged by said plungers, aplunger-operating shaft rotatively mounted above the bed and insupporting engagement with both of said plungers, and means foroperating the plungeroperating shaft.

Signed at Chicago, Illinois, this 16th day of June, 1924.

CHRISTIAN N. SMITH.

Witness:

HARRY I. CRoMER.

